From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 401162FF179; Wed, 3 Dec 2025 15:34:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764776067; cv=none; b=lJdsCGP4KJzSYluSCDpCsoQlRBQClIWtgFNeXcqd96Qb3z8HfU0N2hJmGsEgvRtfxKKbShvt+3h+5JB147PrsKeit3+pwen14CZReFQVPxfvc0eP9LHWmGNFvtV9jZ6ap2ObHpgs3+3U0aviBfwTBvQhidKdGwxrPb2021E9JZg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764776067; c=relaxed/simple; bh=lWyabRdBtirziIhAXMB1gKopmNW9k4EJWWTzW/YY1E0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=V+zNQAUzX2LhN0fIKgUxtJ27nXocPjDYO3wYBXb9ecI7ervdy4yKaALBle2UTgGsXgVrgf2FWAxDucQKfyfOIeJVXJmzUO6ZLEbKsVfwPLcu+PudwpRMm0IATdbTh+g8COYafSgVvJOe3rCeaydsTxMIuX2HP1sooBk/rxNxT+E= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=SMHqS8T6; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="SMHqS8T6" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7EFEFC4CEF5; Wed, 3 Dec 2025 15:34:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1764776067; bh=lWyabRdBtirziIhAXMB1gKopmNW9k4EJWWTzW/YY1E0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=SMHqS8T62bXeaQHoB0wHiNyzedUgIsC4Mq/EuOlkkUkGZ9KQTpBQzBkKlwSluGng8 6FDfVg7e3GzhNh3Tg7xYeuls3cSyYaA0APge1SZ9VTFxGGBe+uADaF63609oZqwENu /X3qsrG+eERPD+HSKMeA/6P7qXDEFysgXOFe6fv0= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Marcos Del Sol Vives , Bjorn Helgaas , Sasha Levin Subject: [PATCH 5.10 071/300] PCI: Disable MSI on RDC PCI to PCIe bridges Date: Wed, 3 Dec 2025 16:24:35 +0100 Message-ID: <20251203152403.252371119@linuxfoundation.org> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20251203152400.447697997@linuxfoundation.org> References: <20251203152400.447697997@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.10-stable review patch. If anyone has any objections, please let me know. ------------------ From: Marcos Del Sol Vives [ Upstream commit ebc7086b39e5e4f3d3ca82caaea20538c9b62d42 ] RDC PCI to PCIe bridges, present on Vortex86DX3 and Vortex86EX2 SoCs, do not support MSIs. If enabled, interrupts generated by PCIe devices never reach the processor. I have contacted the manufacturer (DM&P) and they confirmed that PCI MSIs need to be disabled for them. Signed-off-by: Marcos Del Sol Vives Signed-off-by: Bjorn Helgaas Link: https://patch.msgid.link/20250705233209.721507-1-marcos@orca.pet Signed-off-by: Sasha Levin --- drivers/pci/quirks.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index 7d9f048ed18f8..ac355ae17bfee 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -2554,6 +2554,7 @@ static void quirk_disable_msi(struct pci_dev *dev) DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_8131_BRIDGE, quirk_disable_msi); DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, 0xa238, quirk_disable_msi); DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x5a3f, quirk_disable_msi); +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_RDC, 0x1031, quirk_disable_msi); /* * The APC bridge device in AMD 780 family northbridges has some random -- 2.51.0